Add 42/3 and 21/40, Solve 14 0/3 + 21/40 as a fraction

Add 42/3 and 21/40

1^st number: 14 0/3, 2^nd number: 21/40

42/3 + 21/40 is 581/40.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 3 × 40 = 120,
42/3 = 42 × 40/3 × 40 = 1680/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120
Add the two like fractions:
1680/120 + 63/120 = 1680 + 63/120 = 1743/120
1743/120 simplified gives 581/40
So, 42/3 + 21/40 = 581/40
In mixed form: 1421/40

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